Across
1
Tissue that contracts for movement
3
Element found in all living things
6
Preserved remains of ancient life
7
Force that attracts objects together
9
Our home planet
10
Natural satellite of Earth
12
Molten rock beneath Earth surface
Down
1
The Red Planet
2
Reddish electrical conductor
4
Chemical element in table salt
5
Amplified beam of light
8
Substance with pH below 7
11
Nerve cell in the brain
13
Tectonic landmass section